1. Department of Obstetrics and Neonatology, and Researcher Istituto di Ricovero e Cura a Carattere Scientifico, Azienda Unita' Sanitaria Locale di Reggio Emilia Reggio Emilia Italy
2. Department of Obstetrics and Gynecology Carlo Poma Hospital, Azienda Socio Sanitaria Territoriale di Mantova Mantua Italy